Heterotic/heterotic and heterotic/F-theory duality

We consider heterotic target space dual (0,2) gauged linear sigma models on elliptically fibered Calabi-Yau manifolds. In this context, each half of the ``dual'' heterotic theories must in turn have an F-theory dual. Moreover, the apparent...

Physics without determinism: Alternative interpretations of classical physics

Classical physics is generally regarded as deterministic, as opposed to quantum mechanics that is considered the first theory to have introduced genuine indeterminism into physics. We challenge this view by arguing that the alleged determinism of...

UV considerations on scattering amplitudes in a web of theories

The scattering predictions of a web of theories including Yang-Mills, gravity, biadjoint scalar, the nonlinear sigma model (NLSM), Dirac-Born-Infeld-Volkov-Akulov, and the special Galileon (sGal) form a class of special objects with two fascinating...

Machine learning and the physical sciences

In October 2018 an APS Physics Next Workshop on Machine Learning was held in Riverhead, NY. This article reviews and summarizes the proceedings of this very broad, emerging field.

Quantum-Enhanced Advanced LIGO Detectors in the Era of Gravitational-Wave Astronomy

New hardware installed in current gravitational-wave detectors uses quantum effects to boost sensitivity and increase the event detection rate by as much as 50%.

Increasing the Astrophysical Reach of the Advanced Virgo Detector via the Application of Squeezed Vacuum States of Light

New hardware installed in current gravitational-wave detectors uses quantum effects to boost sensitivity and increase the event detection rate by as much as 50%.

Percent-Level Test of Isotropic Expansion Using Type Ia Supernovae

We propose and implement a novel, robust, and nonparametric test of statistical isotropy of the expansion of the Universe and apply it to around 1000 type Ia supernovae from the Pantheon sample. We calculate the angular clustering of supernova...

Amplitudes, resonances, and the ultraviolet completion of gravity

This paper constructs, making use of the on-shell spinor-helicity formalism, a possible ultraviolet completion of gravity following a ``bottom-up'' approach. The assumptions of locality, unitarity, and causality i) require an infinite tower of...

Rotating strings in six-dimensional higher-derivative supergravity

We construct the first analytical rotating string solution in six-dimensional Einstein-Gauss-Bonnet supergravity, carrying both electric and magnetic charges. By embedding the known rotating string solution of the two-derivative theory into...

Band-Gap-Dependent Electronic Compressibility of Carbon Nanotubes in the Wigner Crystal Regime

Researchers have determined the energy required to add an electron to a Wigner crystal---an ordered crystalline state made of electrons rather than atoms.

Majorana dimers and holographic quantum error-correcting codes

This paper shows how a class of Hyperbolic tensor network models is described by Majorana dimers, nonlocal fermionic modes whose entanglement structure directly determines physical correlations of the underlying interacting system. These are also...

Demonstration of Machine Learning-Based Model-Independent Stabilization of Source Properties in Synchrotron Light Sources

Machine-learning algorithms could allow researchers to substantially reduce unwanted fluctuations in the widths of the electron beams produced at synchrotrons.

Emergence of exploitation as symmetry breaking in iterated prisoner's dilemma

Exploitation is frequently seen in society; the exploiting side gains a larger benefit with the sacrifice of exploited one. Can such an asymmetric relationship emerge, even though both the players symmetrically pursue their own benefit in a...

Physical Limit to Concentration Sensing in a Changing Environment

A new theoretical model predicts a fundamental limit to how finely attuned a cell can be to its biochemical surroundings.

Measuring the Transmission Matrix in Optics: An Approach to the Study and Control of Light Propagation in Disordered Media

We introduce a method to experimentally measure the monochromatic transmission matrix of a complex medium in optics. This method is based on a spatial phase modulator together with a full-field interferometric measurement on a camera. We determine...